|
(11) | EP 0 426 551 B1 |
| (12) | EUROPEAN PATENT SPECIFICATION |
|
|
| (54) |
Apparatus for judging whether an uncut lens should be machined or not and lens grinding machine having the same Apparat zum Abschätzen, ob eine unverarbeitete Linse bearbeitet werden sollte oder nicht, und mit diesem Apparat ausgerüstete Linsen-Schleifmaschine Appareil pour juger si une lentille brute peut être usinée ou non et machine à meuler les lentilles équipée de cet appareil |
|
|
|||||||||||||||||||||||||||||||
| Note: Within nine months from the publication of the mention of the grant of the European patent, any person may give notice to the European Patent Office of opposition to the European patent granted. Notice of opposition shall be filed in a written reasoned statement. It shall not be deemed to have been filed until the opposition fee has been paid. (Art. 99(1) European Patent Convention). |
[0001] This invention relates to an apparatus and to a process for judging whether an uncut lens should be machined or not and a lens grinding machine or lens edge grinding machine having the same, in which a judgment is made as to whether a lens having a desired lens frame configuration from an uncut lens before the uncut lens is subjected to grinding treatment by the lens grinding machine.
Description of the Prior Art:
[0002] Heretofore, a lens grinding machine is used for grinding an uncut lens (material lens) into a lens frame configuration of a spectacle frame to which the lens is to be enframed. Before the uncut lens is ground by the lens grinding machine, the axis (or center axis) of a sucking disk or sucking device is brought into alignment with the optical center of the uncut lens and then the sucking disk is allowed to be sucked and attached to the uncut lens. The sucking disk having a shaft portion for mounting to rotating shaft of lens grinding machine and rubber cup for sucking the lens. When this sucking disk is sucked and attached to the lens, the diameter of the sucking disk becomes generally equal to or slightly greater than the diameter of a lens mounting shaft.
[0003] When the peripheral edge of the material lens is ground into the lens frame configuration, a shaft portion of the sucking disk is coaxially held by the lens rotating shaft of the lens grinding machine, the peripheral edge portion of the uncut lens is ground by a grinder which is rotating at a high speed while the rotational axis of the lens is being rotated. At that time, it is a usual practice that the peripheral edge portion of the uncut lens is ground such that the optical center or optical axis of the lens has a desired displacing amount relative to the geometrical center of lens frame.
[0004] Also, today, the lens machining processes are divided or specialized. For example, the lens machining processes include a dot marking process to a material lens , a sucking process for sucking and attaching the sucking disk to the material lens accompanying an aligning or centering process of the material lens, and a grinding process made by a lens grinding machine after the material lens has been sucked by the sucking disk.
[0005] Today where the lens machining processes are such specialized as mentioned, there is such a possibility as to invite a failure in that it is found a desired lens frame configuration cannot be obtained only after the material lens has actually been machined. However, if we take into consideration such a serious fact as that a material lens once failed in machining is usually unable to be machined again, this can be a vital lose to a spectacle store.
[0006] In order avoid such undesirable incidence, it also becomes an important work to check as to whether a desired lens frame configuration (outer configuration) can be obtained or not, if an uncut lens is subjected to grinding treatment made by a lens grinding machine.
[0007] Heretofore, this checking operation was performed using a template which was obtained by machining a material plate copying the lens frame configuration before sucking disk is sucked and attached to the uncut lens. Moreover, when in such checking, the template and the uncut lens were superposed one upon the other in such a manner as that the geometrical center of the template is moved from the optical center of the uncut lens by a desired displacing amount, and it was checked whether the peripheral portion of the template is expanded from the peripheral edge of the uncut lens. And when the peripheral portion of the uncut lens is expanded from the peripheral portion of the uncut lens, the uncut lens was judged as being not large enough to be machined into a template configuration and another selection of an uncut lens of a greater diameter was requested.
[0008] In recent years, there is a spectacle so called "Kanime lens (or pin face lens)" which is for the exclusive use of a shortsighted person and the width of a lens frame of which is extremely narrow in the vertical direction.
[0009] If an attempt is made to obtain such kanime lens or pin face lens from a circular-shaped material lens (uncut lens) by means of grinding using a lens grinding machine, it occurs a so-called "machining interference" in which the sucking disk sucked and attached to the material lens is ground by the lens grinder. When this machining interference is grave, there is such a fear as, that even a mounting member of the sucking disk is also contacted with the lens grinder to break to the lens grinding machine itself.
[0010] Also in case a material lens is to be machined into a general lens frame configuration other than the kanime lens, the machining interference also occurs when a displacing amount (usually called as the "inwardly sided amount" or "upwardly sided amount") between the optical center of the uncut lens and the geometrical center of the lens frame is large.
[0011] The conventional method for checking the "machining interference" before it occurs is performed in such a manner as that a template obtained by copying a lens frame of a spectacle frame and an uncut lens are physically superposed one upon the other taking into consideration the displacing amount thereof, then the sucking disk is sucked and attached onto the uncut lens such that the center of the sucking disk is brought into alignment with the geometrical center of the template, and then it is checked whether the sucking disk expands from the template.
[0012] However, the conventional method for checking an outer diameter machinability using a template and the conventional method for checking the machining interference are very complicated to put into practice. Moreover, if the sucking disk is sucked and attached to the lens before the machining interference is checked, a dot mark on the uncut lens serving as a target mark for centering the displacing position between the uncut lens and the template is hidden by the sucking disk and therefore, the centering operation of the displacing position thereof becomes impossible to carry out, and as a result, it becomes impossible to carry out the checking as for machining interference.
[0013] On the other hand, a lens grinding machine requiring no template came into practice in recent years. As such lens grinding machine, there is known, for example, a "non-former lens grinding machine" or a "patternless lens grinding machine" like a lens grinding machine as disclosed in detail in a Japanese Patent Application No. 60-115079 filed earlier by the present applicant.
[0014] In this new lens grinding machine, the configuration of a lens frame of a spectacle frame is measured by a frame configuration measuring apparatus as one element of the constituent system of the lens grinding machine in order to obtain the distance (radius vector ρi) from the geometrical center of the lens frame to the V-edge groove of the lens frame every predetermined angle ϑi. At that time, the radius vector information (ρi, ϑi)(i=1, 2, 3, ·····N here) is obtained as an electric signal by mechanical/electrical measurement, Thereafter, the lens machining radius vector (Kρi, Kϑi)(i=1, 2, 3, ·····N here) is found by adding the displacing amount between the uncut lens and the lens frame to this electric signal, and the material lens is ground with reference to the lens machining radius vector. The sucking disk is norally sucked and attached to the optical center of the material lens.
[0015] The lens grinding machine disclosed in the above-mentioned Japanese Patent Application n° Sho 60-115079 (or JP-A-61 274) has a lens configuration measuring apparatus for measuring the configuration of a material lens. And this lens grinding machine is designed such that fillers are brought into abut engagement with front and rear refracting surfaces of the uncut lens along the radius vector orbit with reference to the lens machining radius vector (Kρi, Kϑi), and when these fillers are disengaged from the uncut lens, it is automatically judged that a desired lens frame configuration from this material lens and a warning is issued.
[0016] In such non-former lens grinding machine, physical existence as a template does not exist, but only configuration data of the lens frame exists as an electric signal. Accordingly, it is impossible to check whether the machining interference is occurred or not by visually confirming the mutual positional relation between the lens frame configuration data and the sucking disks sucked and attached to the uncut lens.
[0017] Also in this non-former lens grinding machine, although it can overcome the complication of the checking work as to whether the outer configuration of the material lens can be machined, such judgment can be made only after the material lens has been set to the lens rotational shaft. Accordingly, in case it was judged that the material lens cannot be machined, this material lens is required to be replaced with a new material lens having a comparatively large diameter after the checking work has been finished to the material lens which was still in the half-way of the machining process. Moreover, at that time, it is required that the machining worker performs the centering work from the beginning all over again or the worker performs the centering work again to a new material lens having a larger diameter. This naturally turns out the merit of specialization to demerit.
SUMMARY OF THE INVENTION
[0018] A first object of the present invention is to provide an apparatus for judging whether an uncut lens should be machined or not, in which even a worker engaging in one machining process can check as to whether the outer configuration of a material lens can be machined or not before the lens is subjected to the grinding treatment.
[0019] A first construction of the present invention for achieving the first object is an apparatus for judging whether an uncut lens should be machined or not comprising :
a displayer for displaying an image of a lens frame showing the configuration of a lens frame of a spectacle frame with a material lens enframed therein or of a template obtained by copying the same, and an image of the configuration of the uncut lens ;
an imaging circuit for forming an image displayed on said displayer ;
lens diameter/radius input means for inputting the diameter/radius of said material lens ; characterised by
position input menas for inputting an optical center position of said material lens relative to a geometrical center of said lens frame ; and
an arithmetic/judgment circuit which causes said imaging circuit to display said image of said lens frame on said displayer, the configuration of said lens frame being calculated from vector radius information, which is input by a frame configuration measuring apparatus of said lens frame of the spectacle frame or from vector radius information of said template obtained by copying the same, and which causes said imaging circuit to simultaneously display a lens image of said uncut lens on said displayer together with said lens frame image, a position of said lens image of said uncut lens being obtained such that an optical center indicated by said position input means is determined as the center of said lens image of said uncut lens having a diameter/radius indicated by said lens diameter/radius input means.
[0020] With the first construction of the present invention, the image display means displays the lens frame configuration on its display screen, and also displays the lens image having the lens diameter of the material lens input by the lens diameter/radius input means such that the center thereof is located in the optical center position of the lens input by the position input means. The operator visually checks whether at least a part of the lens frame configuration expands outside the lens image. If the lens frame configuration is expanded outside, it can judge that even if the material lens should be ground by the lens grinding machine, the desired lens frame configuration is unobtainable before the material lens is subjected to the machining treatment.
[0021] A second object of the present invention is to provide a lens grinding machine having the above-mentioned machinability judging apparatus.
[0022] A second construction of the present invention is in an apparatus for judging whether an already sucked and attached uncut lens should be cut or not, which further includes judgment means for judging whether at least a part of said lens frame image expands outside said lens image or not, and warning means for issuing a warning when said judgment means has judged that at least a part of said lens frame image expands outside said lens image.
[0023] With the second construction of the present invention, it is automatically judged whether at least a part of the lens frame configuration expands outside the lens image or not, so that a judgment as to whether the outer configuration of the material lens can be machined or not can be made, and when at least a part of the lens frame configuration expands outside the lens image, the warning means automatically issues a warning to the operator that even if the material lens should be ground by the lens grinding machine, said lens frame configuration cannot be obtained.
[0024] A third construction of the present invention for achieving the second object is in a lens grinding machine for inputting a configuration data of a lens frame of a spectacle frame with a material lens enframed therein or of a template obtained by copying thereof, and grinding the material lens based on the configuration data, wherein said lens grinding machine having the machinability judging apparatus, the apparatus having any of the above-mentioned first or second constructions.
[0025] With the third construction the present invention, the construction and function of the apparatus for judging whether an uncut lens should be machined or not can be added to the lens grinding machine.
[0026] A third object of the present invention is to provide an apparatus for judging whether an uncut lens should be machined or not, which is capable of checking with machining interference even for an already sucked and attached material lens.
[0027] A fourth construction of the present invention for achieving the third object is an apparatus for judging whether an already sucked and attached uncut lens should be machined or not including :
a displayer for displaying an image of a lens frame showing the configuration of a lens frame of a spectacle frame with a material lens enframed therein or of a template obtained by copying the same ;
an imaging circuit for forming an image displayed on said displayer ;
- input means for inputting an optical center position of said material lens relative
to a geometrical center of said lens frame ; characterised by
memory means for initially storing an outer configuration of a sucking disk which is sucked and attached to said uncut lens ; and - an arithmetic/judgment circuit which causes said imaging circuit to display said image of said lens frame on said displayer, the configuration of said lens frame being calculated from vector radius information, which is input by a frame configuration measuring apparatus of said lens frame of the spectacle frame or from vector radius information of said template obtained by copying the same, and which causes said imaging circuit to simultaneously display an image of said outer configuration of said sucking disk on said displayer together with said lens frame image, a position of said image of said outer configuration of said sucking disk being obtained such that the center of said outer configuration of said sucking disk is caused to coincide with said optical center position of said material lens on the basis of information concerning an outer configuration of said sucking disk.
[0028] With the fourth construction of the present invention, the image display means displays an image of the lens frame configuration on the display screen, and also displays the outer configuration of the sucking disk on the display screen such that the center of the outer configuration of said sucking disk input is located in the optical center position of the material lens input by said input means. The operator can check whether there is a machining interference or not based on the judgment as to whether the image of the outer configuration of the sucking disk is included in a part of the lens frame configuration image before the material lens is subjected to the machining treatment.
[0029] A fourth object of the present invention is to provide an apparatus for judging whether a uncut lens should be machined or not, in which even the outer configuration of an already sucked and attached material lens can be checked on the side of a worker engaging in machining processes before the lens is subjected to the machining treatment.
[0030] A fifth construction for achieving the fourth object of the present invention is in an apparatus for judging whether an already sucked and attached uncut lens should be machined or not, in which said image display means is designed such that the material lens with the sucking disk sucked and attached thereto can be placed on a display surface thereof in such a manner as that the sucking disk is coincident with the outer configuration of the sucking disk.
[0031] Furthermore, with the fifth construction, the sucked and attached material lens is placed on the display screen of the displayer in such a manner as that the sucking disk is coincident with the displayed image of the outer configuration of the sucking disk in order to check whether even a part of the external periphery of the material lens is expanded from the lens frame configuration display image or not and to make a judgment, if expanded, prior to machining of the material lens that the external configuration cannot be machined.
[0032] A sixth construction of the present invention for achieving the third or fourth object is in an apparatus for judging whether an already sucked and attached uncut lens should be machined or not, in which said input means includes an FPD input means for inputting a frame PD value of said spectacle frame, a PD input means for inputting an inter-pupil distance value of the spectacle user, arithmetic means for calculating a difference between said frame PD value and said inter-pupil distance value and finding an inwardly sided amount of said material lens, and an UP input means for inputting an upwardly sided amount of said material lens.
[0033] With the sixth construction of the present invention, the optical center position of the lens is decided by the inwardly sided amount automatically calculated from the frame PD value and the inter-pupil distance value input by said input means and the upwardly sided amount input by said UP input means.
[0034] A seventh construction of the present invention is, in order to achieve the third object, in an apparatus for judging whether an already sucked and attached uncut lens should be machined or not, which further includes judgment means for judging whether at least a part of the external configuration of said sucking disk is "located" outside the configuration of said lens frame or said template or not, and warning means for issuing a warning to that effect when said judgment means has judged as "located".
[0035] With the seventh construction of the present invention, the judgment means automatically judges whether at least a part of the image displaying the external configuration of the sucking disk is located outside the image displaying the configuration of the lens frame or not, and the warning means automatically issues a warning to the operator telling that there is a machining interference when judged as "located".
[0036] Furthermore, an eighth construction of the present invention is in an apparatus for judging whether an already sucked and attached uncut lens should be machined or not, in which said memory means is adapted to store the radius of a sucking rubber of said sucking disk at the time said material lens is sucked and attached as the external configuration of said sucking disk.
[0037] With the eighth construction of the present invention, the external configuration of the sucking disk is stored in the memory means as a radius value at the time the sucking disk is sucked and attached to the lens and the image displaying the external configuration of the sucking disk is image displayed as a circle having said radius.
[0038] A fifth object of the present invention is to provide a lens grinding machine which is provided with the machinability judging apparatus in order to achieve the third and fourth objects.
[0039] And in order to achieve the fifth object, a ninth construction of the present invention is in a lens grinding machine for inputting a configuration data of the lens frame of the spectacle frame into which the material lens is to be enframed or of the template obtained by copying thereof and grinding the material lens based on said configuration data, said lens grinding machine being provided with the apparatus for judging whether an already sucked and attached uncut lens should be machined or not.
[0040] With the ninth construction of the present invention, the construction and function of the apparatus for judging whether an already sucked and attached uncut lens should be machined or not can be added to said lens grinding machine.
[0041] Finally, the invention is related to a process for judging whether an already sucked and attached uncut ins should be machined or not with an apparatus according to the fourth construction, characterised in that a judgment whether or not said uncut lens should be machined is formed in such a manner that a visual judgment is formed as to whether or not said lens frame image displayed on said displayer is included within the external periphery of said uncut lens placed on said displayer when said uncut lens with a sucking disk already sucked and attached thereto is place on said displayer so as to fit said sucking disk to an outer configuration of a sucking disk displayed on said displayer.
BRIEF DESCRIPTION OF THE ATTACHED DRAWINGS
[0042]
Fig. 1 is a perspective view of the outer appearance of a lens grinding machine having an apparatus for judging whether an uncut lens should be machined or not according to the present invention;
Fig. 2 is a block diagram showing the construction of the apparatus for judging whether an uncut lens should be machined or not;
Fig. 3 is a diagrammatical view for explaining the image display relation between a lens frame image and an image of the external configuration of a sucking disk and a method for finding the minimum lens diameter;
Fig. 4 is a diagrammatical view showing one example of the image display when there is a machining interference;
Fig. 5 is a diagrammatical view showing the image display relation between an image of the external configuration of a sucking disk for a kanime lens and the lens frame image;
Fig. 6A is a grammatical view showing the correlation among the lens frame image, the image of the external configuration of the sucking disk and the material lens placed when the lens frame configuration cannot be taken from the material lens;
Fig. 6B is a diagrammatical view showing one example in which the material lens is moved fro: the state of Fig. 6A and brought to a state where the lens frame configuration can be taken;
Fig. 7A is a diagrammatical view showing the correlation among the lens image, the lens frame image and the image of the external configuration of the sucking disk when the lens frame configuration cannot be taken from the material lens;
Fig. 7B is a diagrammatical view showing one example in which the lens image and the image of the external configuration of the sucking disk are moved from the state of Fig. 7A and brought to a state where the lens frame configuration can be taken; and
Fig. 8 is a diagrammatical view showing the correlation among the lens image, the lens frame image and the image of the external configuration of the sucking disk when an eccentric lens is utilized.
DESCRIPTION OF THE PREFERRED EMBODIMENT
[0043] One embodiment of the present invention will be described hereunder with reference to the accompanying drawings.
[CONSTRUCTION]
[0044] Fig. 1 is a perspective view showing the outer appearance of a lens grinding machine having an apparatus for judging whether an uncut lens should be machined or not according to the present invention.
[0045] The numeral 10 denotes a frame configuration measuring apparatus which is adapted to measure, mechanically/electrically, the configuration of a lens frame 501 of a spectacle frame 500 or the configuration of a template (not shown) obtained by copying the lens frame 501. This frame configuration measuring apparatus 10 is electrically connected to a lens grinding machine body 11.
[0046] The lens grinding machine body 11 is a nonformer lens grinding machine for grind machining an uncut lens (material lens)L based on configuration data of the lens frame 501 coming from the frame configuration measuring apparatus 10.
[0047] Since the detail of the constructions of the frame configuration measuring apparatus 10 and the lens grinding machine body 11 is the same to that disclosed in the above-mentioned Japanese Patent Application No. Sho 60-115079, description thereof will be omitted.
[0048] An operating portion A disposed in front of a machining portion B of the lens grinding machine body 11 is provided with an electric circuit 1, a displayer 2, and an input keyboard 3 all constituting the machinability judging apparatus.
[0049] As is shown in Fig. 2, the electric circuit 1 includes a a lens frame configuration memory 101 for storing a vector radius information (ρi, ϑi)(i=1, 2, 3, ·····N here) of the lens frame 501 measured by the frame configuration measuring apparatus 10, and this lens frame configuration memory 101 is connected to an arithmetic/judgment circuit 102. The arithmetic/judgment circuit 102 is connected with an image processsing circuit (imaging processing unit) or an imaging circuit 104 and a control circuit 105, and the control circuit 105 is connected with a buzzer 106 as one of warning means. A sucking disk configuration memory 103 is connected to the imaging circuit 104. Also, the arithmetic/judgment circuit 102 is connected to a machining control circuit B2 belonging to a machining portion B through a machining data memory B1. Since the constructions and functions of the machining data memory B1 and the machining control circuit B2 are the same to that disclosed in the above-mentioned Japanese Patent Application No. Sho 60-115079, description thereof will be omitted.
[0050] The imaging circuit 104 is connected to the displayer 2 comprising, for example, a liquid crystal displayer. This displayer 2 includes an image display portion 21 and a data display portion 22. The control circuit 105 is connected with the input keyboard 3.
[0051] Also, the display content of the displayer 2 and the construction of various input keys of the input keyboard 3 will be described in the following description of the operation.
[OPERATION]
① DATA INPUT
[0052] When the configuration of the lens frame 501 of the spectacle frame 500 has been measured by the frame configuration measuring apparatus 10 and the vector radius information (ρi, ϑi) has been stored in the lens frame configuration memory 101, the operator operates an FPD-key 301 of the input keyboard 3, controls the imaging circuit 104 through the control circuit 105 to switch an "FPD" index 221a of the data display portion 22 to a white letter display (indicated by double struck slant lines in Fig. 2), and operates ten-key 317 to input a frame PD value FPD to have the "FPD" display portion 221b display numerical values.
[0053] Next, the operator operates a PD-key 302 of the input keyboard 3, likewise switches a "PD" index 222a of the data display portion 22 to a while letter display, and operates the ten-key 317 to input the spectacle user's inter-pupil distance value PD to have the "PD" display portion 222b display numerical values. Furthermore, where an upwardly sided amount UP is required to be input, the operator operates an UP-key 303 to switch an "UP" index 223a of the data display portion 22 of the data display portion 22 to a white letter display, and operates the ten-key 317 to input the upwardly sided amount UP to have the "UP" display portion 223b display numerical values. Also, a circular cylindrical axis angle-key 306, an R-key 308 and the ten-key 317 are operated to input a right eye circular cylindrical axis angle αr to have a "R" display portion 227b display numerical values. Likewise, the circular cylindrical axis angle-key 306, an L-key 307, and the ten-key 317 to input a left eye circular cylindrical axis angle αl to have the "L" display portion 226b display numerical values.
[0054] The frame PD value FPD, the inter-pupil distance value PD and the upwardly sided value UP are input into the arithmetic/judgment circuit 102 through the control circuit 105 by operating a set-key 318 each time. Also, the circular cylindrical axis angles αr, αl, are input into the imaging circuit 104 through the control circuit 105.
② IMAGE DISPLAY OF LENS FRAME IMAGE AND EXTERNAL CONFIGURATION OF SUCKING DISK
[0055] As is diagrammatically shown in Fig. 3, the arithmetic/judgment circuit 102 finds the coordinates (Xi, Yi) in a XØ-YØ coordinate system of each measuring point Pi(i=1, 2, 3, ····N here) of the lens frame utilizing the vector radius information (ρi, ϑi) of the left eye lens frame stored in the lens frame configuration memory 101 from the following equations;
and these coordinates Pi(Xi, Yi) are input into the imaging circuit 104.
The imaging circuit 104 image displays the left eye lens frame image 211L in accordance with the XØ-YØ coordinate system predetermined in the image display portion 21 of the displayer 2 utilizing the coordinates Pi(Xi, Yi).
[0056] Likewise, the arithmetic/judgment circuit 102 performs the similar calculation as the equation (1) for the vector radius information of the right eye lens frame stored in the lens frame configuration memory 101, and image displays the right eye lens frame image 211R in accordance with the XØ-YR coordinate system in which the frame PD value FPD portion YR axis is moved from the YØ coordinate axis.
[0057] By this, the left eye lens frame image 211L and the right eye lens frame image 211R are images displayed on the image display portion 21 with the geometrical centers OØ, OR thereof spaced apart in the image frame PD value FPD portion X0 axial direction. Also, the imaging circuit 104 image displays the lens frame center targets 212L and 212R comprising reticules which are coincident with the geometrical center OØ
OR positions at crossing points showing the geometrical centers OØ
OR positions of the lens frames.
[0058] If only the vector radius information (ρi, ϑi) of the left eye lens frame is stored in the lens frame configuration memory 101 (As the left and right lens frame configurations are usually the same, the configuration of only one lens frame is measured in many cases), the left eye lens frame configuration may be inverted with reference to the YØ axis as sown in Fig. 3, that is, the X coordinate of the coordinates Pi(Xi, Yi) may be multiplied by (-1) to obtain the coordinates Pi(-Xi, Yi), and then these coordinates Pi(-Xi, Yi) may be allowed to follow the XØ-YR coordinate system to image display the right eye lens frame image 211R.
[0059] The arithmetic/judgment circuit 102 calculates an inwardly sided amount IN from the frame PD value FPD and the inter-pupil distance value PD based on the following equation;
and by utilizing the inwardly sided amount IN and the upwardly sided amount UP input through the input keyboard 3, the left eye sucking disk center OL(IN, UP) is determined in a position displaced by the inwardly sided amount IN portion in the XØ axis direction and upwardly sided amount UP portion in the YØ axis direction from the origin OØ (geometrical center of the left eye lens frame image 211L), and the same is input into the imaging circuit 104. Then, the imaging circuit 104 reads the radius r of the sucking disk C stored in the sucking disk configuration memory 103 and image displays the left eye sucking disk external configuration image 213L comprising a circle having a radius r drawn about the left eye sucking disk center OL(IN,UP) on the image display portion 21.
[0060] Likewise, the arithmetic/judgment circuit 102 determines the right eye sucking disk center OR(-IN, UP) in a position displaced by the inwardly sided amount -IN portion obtained based on the equation (3) in the XØ axis direction and the upwardly sided amount UP portion in the YØ axis direction, and inputs the same into the imaging circuit 104. The imaging circuit 104 reads the radius r of the sucking disk C stored in the sucking disk configuration memory 103, and image displays the right eye sucking disk external configuration image 213R comprising a circle having a radius r and drawn about the right eye sucking disk center OR(-IN, UP) on the image display portion 21.
[0061] Also, the imaging circuit 104 image displays the sucking disk center targets 214L, 214R in which the respective crossing points showing the sucking disk centers OL, OR are coincident with the sucking disk centers OL, OR on the image display portion 21.
[0062] Furthermore, the imaging circuit 104 image displays the circular cylindrical axis angular lines 215L, 215R rotated by the circular cylindrical axis angles αr, al, portion from the horizontal lines of the sucking disk center targets 214L, 214R based on the circular cylindrical axis angles αr, αl, input through the input keyboard 3 on the image display portion 21.
③ MACHINING INTERFERENCE CHECK
[0063] The operator judges from the display image whether even a part of the left eye sucking disk external configuration image 213L is located in an outside area of the left eye lens frame image 211L image displayed on the image display portion 21 or not. Likewise, the operator judges by eye from the display image whether even a part of the right eye sucking disk external configuration image 213R is located in an outside area of the right eye lens frame image 211R image displayed on the image display portion 21 or not. If a part of the right eye sucking disk external configuration image 213R is included in the outside area 217 of the right eye lens frame image 211R as exemplified in Fig. 4, it judges as "there is a machining interference".
[0064] It may be designed such that instead of the operator's judgment of the machining interference by eye, the arithmetic/judgment circuit 102 judges whether a part of the sucking disk external configuration image 213 is included in the outside area of the lens frame image 211 or not.
[0065] For example, as is shown in Fig. 4, an equation of a circle for forming an image of the sucking disk external image 213 (as the same idea can be applied to the images of the right and left eyes, the reference characters R. L will be omitted) can be expressed as follow;
All dots of the lens frame coordinates Pi(Xi, Yi) forming the lens frame image 211 are substituting into the equation (4). And when there is even a dot of coordinate satisfying the following equation;
it indicates that a part of the lens frame image 211 is included in or contacts with the sucking disk external configuration image 213 and the arithmetic/judgment circuit 102 judges that there is a generation of machining interference.
[0066] When the arithmetic/judgment circuit 102 judges "there is a machining interference", it instructs the control circuit 105 to that effect, and the control circuit 105 actuates the buzzer 106 to issue a warning to the operator.
[0067] Where the machining interference is negligibly small in amount and there is little problem in view of spectacle treatment even if the decentering amount (inwardly sided amount, upwardly sided amount) from a refractive force of the lens L is slightly changed, it may be designed such that a R-key 307, an L-key 308 and arrow-keys 311 through 313 are operated to image move the sucking disk external configuration image 213 in the vertical and horizontal directions to bring the sucking disk external configuration image 213 into a position where the machining interference is removed. In association with this image movement, the arithmetic/judgment circuit 102 calculates tile change of the inter-pupil distance value PD and the upwardly sided amount UP and displays the values on the "PD" display portion 222b and "UP" display portion 223b, respectively. Relatively same effects can be obtained, if the lens frame image 211 is moved instead of moving the sucking disk external configuration image 213.
[0068] The arithmetic/judgment circuit 102 automatically judges whether there is machining interferences of sucking disk external configuration images 218, 219 for the kanime lens or not as follows. That is, if the Y coordinate Yj of the lens frame coordinates Pj(Xj, Yj) where the above-mentioned equation (5) is established is Yj>YA with respect to the Y coordinate YA of the horizontal line 218 of the sucking disk external configuration image for the kanime lens, the arithmetic/judgment circuit 102 judges "there is no machining interference", and if Yj≦YA, it judges "there is a machining interference".
④ CHECKING AS TO WHETHER EXTERNAL CONFIGURATION SHOULD BE MACHINED OR NOT
[0069] The control circuit 105 instructs the imaging circuit 104 to display a message reading "place an already sucked and attached lens here" on a message display portion 210.
[0070] According to the above message, the operator places the uncut lens (material lens) L for the left eye with the sucking disk C sucked and attached to the optical center thereof on the display screen of the image display portion 21 of the displayer 2 in such a manner as that the sucking disk C is coincident to the sucking disk external configuration image 213L as shown in Fig. 2 using a known centering device.
[0071] By this, the lens L is coincident to the sucking disk center OL (see Fig. 3) at its optical center. This means that the optical center of the lens L is coincident to the center of the pupil of the spectacle user when he/she wears the spectacle.
[0072] In the case of an uncut lens with a sucking disk C' for the kanime lens sucked and attached thereto, the lens is placed on the display screen in such a manner as that the sucking disk C' is coincident to the sucking disk external configuration images 218, 219 for the kanime lens as shown in fig. 5.
[0073] The operator checks through the eye as to whether the external periphery of the uncut lens L is included in the lens frame image 211L. As is shown in Fig. 2, when the entire external periphery of the lens L is located in the outside area of the lens frame image 211L, it is judged that the lens frame configuration "can be taken" in this eccentric position of the lens L by grind machining.
[0074] The similar checking as to whether the external configuration should be machined or not is also performed to the uncut lens (material lens) for the right eye.
[0075] For example, as is exemplified in Fig. 6A, in case a part of the external periphery of the uncut lens (material lens) L for the right eye is included in the inside area of the right eye lens frame configuration image 211R, it is judged that the lens frame configuration "cannot be taken" in this eccentric position of the lens L by grind machining.
[0076] In case it was judged as "cannot be taken" by the operator's eye, the material lens is usually exchanged for another lens having a larger diameter, but in case the refractive force of the lens is small, or depending on angles of the circular cylindrical axis, the lens L may be moved on the display screen in such a manner as that the lens frame image 211 will be included within the lens L as shown in Fig. 6B. After the lens L has been moved as shown in Fig. 6B, the operator operates a R-key 308 (since the lens for the right eye was moved in the example of Fig. 6B), and the arrow-keys 311 through 313 to image move the sucking disk image 213R in such a manner as to be coincident to the sucking disk C sucked and attached to the lens L. The arithmetic/judgment circuit 102 calculates a new inter-pupil distance value PD and a new upwardly sided amount UP in accordance with the movement of the sucking disk image 213R and displays the respective values on the "PD display portion 222b and "UP" display portion 223b.
[0077] Instead of checking as to whether the external configuration should be machined or not by the eye of the operator as mentioned above, it may be designed such that the arithmetic/judgment circuit 102 automatically checks whether the external configuration should be machined or not. In that case, the operator operates a lens diameter-key and the ten-key 317 to input the diameter of the uncut lens L into the arithmetic/judgment circuit 102 through the control circuit 105.
[0078] The arithmetic/judgment circuit 102 calculates
and inputs this radius RN into the imaging circuit 104.
[0079] The imaging circuit 104, as shown in Fig. 7A, image displays the lens image 220 on the image display portion 21 by a circle having the radius RN and drawn about a lens optical center O' (coincident to the sucking disk center) which is moved from the geometrical center O' of the lens frame image 211 by a decentering amount, that is, inwardly sided amount IN and upwardly sided amount UP.
[0080] The circle of the lens image 220 can be expressed, as in the equation (4), by the following equation;
from the lens radius RN, and the decentering amounts IN, UP. Accordingly, the whole dots of the lens frame configuration coordinates Pi(Xi, Yi) forming the lens frame image 211 are substituted into this equation (6). And if there is even one dot where the coordinate satisfies the following equation;
the arithmetic/judgment circuit 102 determines that a part of the lens frame image 211 is expanded from the lens image of the radius RN as shown in Fig. 7A, judges that the required lens frame configuration "cannot be taken" from this lens L, and instructs the control circuit to actuate the warning buzzer 106.
[0081] Even if it was judged as "cannot be taken" as a result of the automatic external configuration checking as to whether the material lens should be machined or not by this arithmetic/judgment circuit 102, in case the refractive force of the lens is small, or depending on angles of the circular cylindrical axis, the lens image 220 may be image moved in such a manner as that the lens frame image 211 will be included within the lens image 220 as shown in Fig. 7B. In that case, the operator operates a R-key 308 or an L-key 307 and the arrow-keys 311 through 313 to image move the sucking disk image 213 and the lens image 220 together as such that the lens frame image 211 will be included in the lens image 220. The arithmetic/judgment circuit 102 calculates a new inter-pupil distance value PD and a new upwardly sided amount UP and displays the respective values on the "PD display portion 222b and "UP" display portion 223b.
[0082] As is shown in Fig. 8, when an eccentric lens, which is decentered upwardly by up and inwardly by in from the geometrical center OG, is used, the eccentric-key 309, the IN-key 310 and the ten-key 317 is operated to input the decentering amounts up and in of the eccentric lens into the arithmetic/judgment circuit 102 through the control circuit 105. The arithmetic/judgment circuit 102 finds the coordinates (XG, YG) of the geometric center OG of the eccentric lens from the decentering amounts IN and UP between the lens optical center O' (coincident to the sucking disk center) and the geometrical center O of the lens frame image 211 which are already input, and the decentering amounts up, in of the eccentric lens which are input this time as follows;
And the imaging circuit 104 image displays the lens image 220 having a radius equal to the radius RN (input value) of the eccentric lens on the image display portion 21 having its center at the geometrical center OG.
[0083] Also, in checking as to whether the external configuration should be machined or not, the equation (6) is rewritten into the following equation (10);
and all dots of the lens frame configuration coordinates Pi(Xi, Yi) are substituted into this equation (10), and if there are all coordinate dots as follows;
it is judged that the desired lens frame configuration "can be taken" from this eccentric lens.
⑤ CALCULATION/DISPLAY OF MINIMUM LENS DIAMETER MACHINABLE
[0084] When the operator judges by his/her eye that the external configuration "cannot be taken" through checking or when it is automatically judged to that effect, if he/she wants to know the minimum lens diameter required to taking the lens frame configuration, he/she operates the minimum lens diameter-key. Then, the arithmetic/judgment circuit 102, as shown in Fig. 3, converts the lens frame coordinates Pi(Xi, Yi) to coordinates Pi'(Xi', Yi') of a coordinate system serving the origin OL as its origin using the following equations;
and then converts the coordinates Pi'(Xi', Yi') to a coordinate system serving the origin O as its origin using the following equations;
and then selects the longest one out of the vector radii ρi'. Then, a lens L' serving this as its radius Rm is the minimum lens required taking the lens frame configuration. Radius
is served as the minimum lens diameter machinable and the same is displaced in numerical value on a minimum diameter-display portion 225b. Also, it may be image displayed on the image display portion 21.
[0085] In a machinability judgment apparatus and a lens grinding machine having the same in the above-described embodiments, measuring data of the lens frame 501 coming from the frame configuration measuring apparatus 10 is utilized as the lens frame configuration information. However, the present invention is not limited to this. Information initially stored in a memory medium such as floppy disk and IC card may be utilized as the lens frame configuration information or otherwise, online information from a frame maker and agent may be utilized.
[0086] As described in the foregoing, according to the present invention, there can be provided a lens machinability judging apparatus, in which the optical center of the uncut lens is decentered from the geometrical center of the lens frame image by a desired amount and therefore, the lens image having a lens diameter of the uncut lens can be image displayed together with the lens frame image. With this apparatus, the operator can check the external configuration machinability in which a judgment is made by the operator's eye as to whether at least a part of the lens frame image is expanded from the lens image. It has such an advantage as that when expanded, it can be checked that the desired lens frame configuration "cannot be taken" even if the material lens should be ground by the lens grinding machine before the material lens is subjected to such machining.
[0087] Also, by providing judgment means and warning means, a judgment as to whether at least a part of the lens frame configuration is "expanded" outside the lens image or not can be performed automatically. And when "expanded", the warning means can automatically issue a warning to the operator that the desired lens frame configuration "cannot be obtained" even if the material lens should be ground by the lens grinding machine. By this, the operator is not required to perform a judging operation as to "expansion".
[0088] Furthermore, according to the present invention, a construction of a lens machinability judging apparatus and a function thereof can be added to the lens grinding machine. Owing to the foregoing, the invention has such an advantage as that there can be checked as for machinability of the external configuration before the lens is subjected to the machining treatment.
[0089] Also, according to the present invention, there can be provided a machinability judging apparatus, in which the lens frame image and the sucking disk external configuration image can be image displayed together by decentering them by decentering amount portion of the lens frame and the uncut lens and the machining interference can be checked by checking whether at least a part of the sucking disk external image is expanded outside the lens frame image or not, before the lens is subjected to the grinding treatment.
[0090] Also, there can be provided a machinability judging apparatus, in which an uncut lens with a sucking disk already sucked and attached thereto can be placed on the display screen as such that the sucking disk will be coincident to the sucking disk external configuration image, and by checking whether at least a part of the external periphery of the uncut lens placed on the display screen is expanded from the lens frame image or not, there can be perform an external configuration machinability checking for checking whether a desired lens frame configuration can be taken from this uncut lens before the lens is subjected to the grinding treatment.
[0091] Furthermore, there can be provided a lens grinding machine having the machinability judging apparatus, by which there can be checked as to the machining interference and as to the external configuration machinability during the machining process before the material lens is subjected to the grinding treatment.
1. An apparatus for judging whether an uncut lens (L) should be machined or not, comprising
:
a displayer (2) for displaying an image (211) of a lens frame showing the configuration of a lens frame (501) of a spectacle frame (500) with a material lens enframed therein or of a template obtained by copying the same, and an image of the configuration of the uncut lens (L) ;
an imaging circuit (104) for forming an image displayed on said displayer ;
lens diameter/radius input means for inputting the diameter/radius of said material lens ; characterised by
position input means for inputting an optical center position of said material lens relative to a geometrical center of said lens frame ; and
an arithmetic/judgment circuit (102) which causes said imaging circuit to display said image of said lens frame on said displayer (2), the configuration of said lens frame being calculated from vector radius information (ρ1, ϑ1), which is input by a frame configuration measuring apparatus (10) of said lens frame of the spectacle frame or from vector radius information of said template obtained by copying the same, and which causes said imaging circuit (104) to simultaneously display a lens image of said uncut lens on said displayer together with said lens frame image, a position of said lens image of said uncut lens being obtained such that an optical center indicated by said position input means is determined as the center of said lens image of said uncut lens having a diameter/radius indicated by said lens diameter/radius input means.
a displayer (2) for displaying an image (211) of a lens frame showing the configuration of a lens frame (501) of a spectacle frame (500) with a material lens enframed therein or of a template obtained by copying the same, and an image of the configuration of the uncut lens (L) ;
an imaging circuit (104) for forming an image displayed on said displayer ;
lens diameter/radius input means for inputting the diameter/radius of said material lens ; characterised by
position input means for inputting an optical center position of said material lens relative to a geometrical center of said lens frame ; and
an arithmetic/judgment circuit (102) which causes said imaging circuit to display said image of said lens frame on said displayer (2), the configuration of said lens frame being calculated from vector radius information (ρ1, ϑ1), which is input by a frame configuration measuring apparatus (10) of said lens frame of the spectacle frame or from vector radius information of said template obtained by copying the same, and which causes said imaging circuit (104) to simultaneously display a lens image of said uncut lens on said displayer together with said lens frame image, a position of said lens image of said uncut lens being obtained such that an optical center indicated by said position input means is determined as the center of said lens image of said uncut lens having a diameter/radius indicated by said lens diameter/radius input means.
2. An apparatus for judging whether an uncut lens should be machined or not according
to claim 1, which further includes judgment means for judging whether at least a part
of said lens frame image expands outside said lens image or not, and warning means
for issuing a warning when said judgment means has judged that at least a part of
said lens frame image expands outside said lens image.
3. A lens grinding machine for inputting a configuration data of a lens frame of a spectacle
frame with a material lens enframed therein or of a template obtained by copying thereof,
and grinding the material lens based on said configuration data, said lens grinding
machine having said lens machinability judging apparatus according to claim 1 or 2.
4. An apparatus for judging whether an already sucked and attached uncut lens should
be machined or not, comprising :
a displayer (2) for displaying an image (211) of a lens frame showing the configuration of a lens frame (501) of a spectacle frame (500) with a material lens enframed therein or of a template obtained by copying the same ;
an imaging circuit (104) for forming an image displayed on said displayer ;
input means for inputting an optical center position of said material lens relative to a geometrical center of said lens frame ; characterised by
memory means (103) for initially storing an outer configuration (213) of a sucking disk (C) which is sucked and attached to said uncut lens ; and
an arithmetic/judgment circuit (102) which causes said imaging circuit to display said image of said lens frame (211) on said displayer (2), the configuration of said lens frame being calculated from vector radius information, which is input by a frame configuration measuring apparatus of said lens frame of the spectacle frame or from vector radius information of said template obtained by copying the same, and which causes said imaging circuit to simultaneously display an image of said outer configuration (213) of said sucking disk (C) on said displayer together with said lens frame image, a position of said image of said outer configuration of said sucking disk being obtained such that the center (O') of said outer configuration of said sucking disk (C) is caused to coincide with said optical center position (O) of said material lens on the basis of information concerning an outer configuration of said sucking disk.
a displayer (2) for displaying an image (211) of a lens frame showing the configuration of a lens frame (501) of a spectacle frame (500) with a material lens enframed therein or of a template obtained by copying the same ;
an imaging circuit (104) for forming an image displayed on said displayer ;
input means for inputting an optical center position of said material lens relative to a geometrical center of said lens frame ; characterised by
memory means (103) for initially storing an outer configuration (213) of a sucking disk (C) which is sucked and attached to said uncut lens ; and
an arithmetic/judgment circuit (102) which causes said imaging circuit to display said image of said lens frame (211) on said displayer (2), the configuration of said lens frame being calculated from vector radius information, which is input by a frame configuration measuring apparatus of said lens frame of the spectacle frame or from vector radius information of said template obtained by copying the same, and which causes said imaging circuit to simultaneously display an image of said outer configuration (213) of said sucking disk (C) on said displayer together with said lens frame image, a position of said image of said outer configuration of said sucking disk being obtained such that the center (O') of said outer configuration of said sucking disk (C) is caused to coincide with said optical center position (O) of said material lens on the basis of information concerning an outer configuration of said sucking disk.
5. An apparatus for judging whether an already sucked and attached uncut lens should
be machined or not according to claim 4, wherein said image display means is designed
such that said material lens with the sucking disk sucked and attached thereto can
be placed on a display surface thereof in such a manner as that said sucking-disk
is coincident with the outer configuration of said sucking disk.
6. An apparatus for judging whether an uncut lens should be machined or not according
to any one of claims 1, 2, 4 and 5, wherein said input means includes an FPD input
means for inputting a frame PD value of said spectacle frame, a PD input means for
inputting an interpupil distance value of the spectacle user, arithmetic means for
calculating a difference between said frame PD value and said interpupil distance
value and finding an inwardly sided amount of said material lens, and an UP input
means for inputting an upwardly sided amount of said material lens.
7. An apparatus for judging whether an already sucked and attached uncut lens should
be machined or not according to any one of claims 4 to 6, which further includes judgment
means for judging whether at least a part of the external configuration of said sucking
disk is "located" outside the configuration of said frame or said template or not,
and warning means for issuing a warning to the effect when said judgment means has
judged as "located".
8. An apparatus for judging whether an already sucked and attached uncut lens should
be machined or not according to any one of claims 4 to 7, wherein said memory means
is adapted to store the radius of a sucking rubber of said sucking disk at the time
said material lens is sucked and attached as the external configuration of said sucking
disk.
9. A lens grinding machine for inputting a configuration data of said lens frame of said
spectacle frame into which said material lens is to be enframed or of said template
obtained by copying thereof and grinding said material lens based on said configuration
data, said lens grinding machine being provided with the apparatus for judging whether
an already sucked and attached uncut lens should be machined or not according to any
one of claims 4 to 8.
10. Process for judging whether an already sucked and attached uncut lens should be machined
or not with an apparatus according to claim 4 characterised in that a judgment whether
or not said uncut lens should be machined is formed in such a manner that a visual
judgment is formed as to whether or not said lens frame image displayed on said displayer
is included within the external periphery of said uncut lens placed on said displayer
when said uncut lens with a sucking disk already sucked and attached thereto is placed
on said displayer so as to fit said sucking disk to an outer configuration of a sucking
disk displayed on said displayer.
1. Apparat zum Beurteilen, ob eine unbearbeitete Linse (L) bearbeitet werden sollte oder
nicht, mit
einer Anzeigevorrichtung (2) zur Anzeige eines Bildes (211) eines Linsenrahmens, das die Konfiguration eines Linsenrahmens (501) eines Brillenrahmens (500) mit einer davon umrahmten körperlichen Linse oder einer durch Nachbilden derselben erhaltenen Schablone zeigt, und eines Bildes der Konfiguration der unbearbeiteten Linse (L);
einer bilderzeugenden Schaltung (104) zum Bilden eines auf der Anzeigevorrichtung angezeigten Bildes;
einer Linsendurchmesser/-radius-Eingabevorrichtung zur Eingabe des Durchmessers/Radius der körperlichen Linse;
gekennzeichnet durch
eine Positionseingabevorrichtung zur Eingabe einer optischen Mittenposition der körperlichen Linse relativ zu einer geometrischen Mitte des Linsenrahmens; und
eine arithmetische Beurteilungs-Schaltung (102), welche bewirkt, daß die bilderzeugende Schaltung das Bild des Linsenrahmens auf der Anzeigevorrichtung (2) anzeigt, wobei die Konfiguration des Linsenrahmens aus Vektorradiusinformationen (ρ1,ϑ1), die durch einen Rahmenkonfigurations-Meßapparat (10) des Linsenrahmens des Brillenrahmens eingegeben werden, oder aus Vektorradiusinformationen der durch Nachbilden desselben erhaltenen Schablone berechnet werden, und welche bewirkt, daß die bilderzeugende Schaltung (104) gleichzeitig ein Linsenbild der unbearbeiteten Linse auf der Anzeigevorrichtung zusammen mit dem Linsenrahmenbild anzeigt, wobei eine Position des Linsenbildes der unbearbeiteten Linse derart erhalten wird, daß eine durch die Positionseingabevorrichtung angezeigte optische Mitte bestimmt wird als die Mitte des Linsenbildes der unbearbeiteten Linse mit einem durch die Linsendurchmesser/-radius-Eingabevorrichtung angezeigten Durchmesser/Radius.
einer Anzeigevorrichtung (2) zur Anzeige eines Bildes (211) eines Linsenrahmens, das die Konfiguration eines Linsenrahmens (501) eines Brillenrahmens (500) mit einer davon umrahmten körperlichen Linse oder einer durch Nachbilden derselben erhaltenen Schablone zeigt, und eines Bildes der Konfiguration der unbearbeiteten Linse (L);
einer bilderzeugenden Schaltung (104) zum Bilden eines auf der Anzeigevorrichtung angezeigten Bildes;
einer Linsendurchmesser/-radius-Eingabevorrichtung zur Eingabe des Durchmessers/Radius der körperlichen Linse;
gekennzeichnet durch
eine Positionseingabevorrichtung zur Eingabe einer optischen Mittenposition der körperlichen Linse relativ zu einer geometrischen Mitte des Linsenrahmens; und
eine arithmetische Beurteilungs-Schaltung (102), welche bewirkt, daß die bilderzeugende Schaltung das Bild des Linsenrahmens auf der Anzeigevorrichtung (2) anzeigt, wobei die Konfiguration des Linsenrahmens aus Vektorradiusinformationen (ρ1,ϑ1), die durch einen Rahmenkonfigurations-Meßapparat (10) des Linsenrahmens des Brillenrahmens eingegeben werden, oder aus Vektorradiusinformationen der durch Nachbilden desselben erhaltenen Schablone berechnet werden, und welche bewirkt, daß die bilderzeugende Schaltung (104) gleichzeitig ein Linsenbild der unbearbeiteten Linse auf der Anzeigevorrichtung zusammen mit dem Linsenrahmenbild anzeigt, wobei eine Position des Linsenbildes der unbearbeiteten Linse derart erhalten wird, daß eine durch die Positionseingabevorrichtung angezeigte optische Mitte bestimmt wird als die Mitte des Linsenbildes der unbearbeiteten Linse mit einem durch die Linsendurchmesser/-radius-Eingabevorrichtung angezeigten Durchmesser/Radius.
2. Apparat zum Beurteilen, ob eine unbearbeitete Linse bearbeitet werden sollte oder
nicht, nach Anspruch 1, welcher weiterhin enthält: eine Beurteilungsvorrichtung zum
Beurteilen, ob sich wenigstens ein Teil des Linsenrahmenbildes außerhalb des Linsenbildes
erstreckt oder nicht, und eine Warnvorrichtung zur Abgabe einer Warnung, wenn die
Beurteilungsvorrichtung bestimmt hat, daß sich wenigstens ein Teil des Linsenrahmenbildes
außerhalb des Linsenbildes erstreckt.
3. Linsenschleifmaschine zur Eingabe von Konfigurationsdaten eines Linsenrahmens eines
Brillenrahmens mit einer davon eingerahmten körperlichen Linse oder einer durch dessen
Nachbildung erhaltenen Schablone, und zum Schleifen der körperlichen Linse auf der
Grundlage der Konfigurationsdaten, wobei die Linsenschleifmaschine einen Linsenbearbeitungs-Beurteilungsapparat
nach Anspruch 1 oder 2 aufweist.
4. Apparat zum Beurteilen, ob eine bereits angesaugte und befestigte unbearbeitete Linse
bearbeitet werden sollte der nicht, mit einer Anzeigevorrichtung (2) zur Anzeige eines
Bildes (211) eines Linsenrahmens, das die Konfiguration eines Linsenrahmens (501)
eines Brillenrahmens (500) mit einer davon umrahmten körperlichen Linse oder einer
durch Nachbilden derselben erhaltenen Schablone zeigt;
einer bilderzeugenden Schaltung (104) zum Bilden eines auf der Anzeigevorrichtung angezeigten Bildes;
einer Eingabevorrichtung zur Eingabe einer optischen Mittenposition der körperlichen Linse relativ zu einer geometrischen Mitte des Linsenrahmens;
gekennzeichnet durch
eine Speichervorrichtung (103) zum anfänglichen Speichern einer äußeren Konfiguration (213) einer Saugscheibe (C), die an die unverarbeitete Linse angesaugt und an dieser befestigt ist; und
eine arithmetische/Beurteilungs-Schaltung (102), welche bewirkt, daß die bilderzeugende Schaltung das Bild des Linsenrahmens (211) auf der Anzeigevorrichtung (2) anzeigt, wobei die Konfiguration des Linsenrahmens aus Vektorradiusinformationen, die durch einen Rahmenkonfigurations-Meßapparat des Linsenrahmens des Brillenrahmens eingegeben werden, oder aus Vektorradiusinformationen der durch Nachbilden desselben erhaltenen Schablone berechnet werden, und welche bewirkt, daß die bilderzeugende Schaltung gleichzeitig ein Bild der äußeren Konfiguration (213) der Saugscheibe (C) auf der Anzeigevorrichtung zusammen mit dem Linsenrahmenbild anzeigt, wobei eine Position des Bildes der äußeren Konfiguration der Saugscheibe derart erhalten wird, daß die Mitte (O') der äußeren Konfiguration der Saugscheibe (C) mit der optischen Mittenposition (O) der körperlichen Linse zusammenfällt auf der Grundlage von Informationen betreffend eine äußere Konfiguration der Saugscheibe.
einer bilderzeugenden Schaltung (104) zum Bilden eines auf der Anzeigevorrichtung angezeigten Bildes;
einer Eingabevorrichtung zur Eingabe einer optischen Mittenposition der körperlichen Linse relativ zu einer geometrischen Mitte des Linsenrahmens;
gekennzeichnet durch
eine Speichervorrichtung (103) zum anfänglichen Speichern einer äußeren Konfiguration (213) einer Saugscheibe (C), die an die unverarbeitete Linse angesaugt und an dieser befestigt ist; und
eine arithmetische/Beurteilungs-Schaltung (102), welche bewirkt, daß die bilderzeugende Schaltung das Bild des Linsenrahmens (211) auf der Anzeigevorrichtung (2) anzeigt, wobei die Konfiguration des Linsenrahmens aus Vektorradiusinformationen, die durch einen Rahmenkonfigurations-Meßapparat des Linsenrahmens des Brillenrahmens eingegeben werden, oder aus Vektorradiusinformationen der durch Nachbilden desselben erhaltenen Schablone berechnet werden, und welche bewirkt, daß die bilderzeugende Schaltung gleichzeitig ein Bild der äußeren Konfiguration (213) der Saugscheibe (C) auf der Anzeigevorrichtung zusammen mit dem Linsenrahmenbild anzeigt, wobei eine Position des Bildes der äußeren Konfiguration der Saugscheibe derart erhalten wird, daß die Mitte (O') der äußeren Konfiguration der Saugscheibe (C) mit der optischen Mittenposition (O) der körperlichen Linse zusammenfällt auf der Grundlage von Informationen betreffend eine äußere Konfiguration der Saugscheibe.
5. Apparat zum Beurteilen, ob eine bereits angesaugte und befestigte unbearbeitete Linse
bearbeitet werden sollte oder nicht, nach Anspruch 4, worin die Bildanzeigevorrichtung
so gestaltet ist, daß die körperliche Linse mit der daran angesaugten und befestigten
Saugscheibe auf einer Anzeigefläche hiervon in der Weise plaziert werden kann, daß
die Saugscheibe mit der äußeren Konfiguration der Saugscheibe zusammenfällt.
6. Apparat zum Beurteilen, ob eine unbearbeitete Linse bearbeitet werden sollte oder
nicht, nach einem der Ansprüche 1, 2, 4 und 5, worin die Eingabevorrichtung enthält:
eine FPD-Eingabevorrichtung zur Eingabe eines Rahmen-PD-Wertes des Brillenrahmens,
eine PD-Eingabevorrichtung zur Eingabe eines Pupillenabstandswertes des Brillenträgers,
eine arithmetische Vorrichtung zum Berechnen einer Differenz zwischen dem Rahmen-PD-Wert
und dem Pupillenabstandswert und zum Finden eines innenseitigen Betrages der körperlichen
Linse, und eine UP-Eingabevorrichtung zur Eingabe eines aufwärtsseitigen Betrages
der körperlichen Linse.
7. Apparat zum Beurteilen, ob eine bereits angesaugte und befestigte unbearbeitete Linse
bearbeitet werden sollte oder nicht, nach einem der Ansprüche 4 bis 6, welcher weiterhin
enthält: eine Beurteilungsvorrichtung zum Bestimmen, ob wenigstens ein Teil der äußeren
Konfiguration der Saugscheibe sich außerhalb der Konfiguration des Rahmens oder der
Schablone "befindet" oder nicht, und eine Warneinrichtung zur Ausgabe einer Warnung
aufgrund des Umstands, daß die Beurteilungsvorrichtung als "befindet" bestimmt hat.
8. Apparat zum Beurteilen, ob eine bereits angesaugte und befestigte unbearbeitete Linse
bearbeitet werden sollte oder nicht, nach einem der Ansprüche 4 bis 7, worin die Speichervorrichtung
geeignet ist zum Speichern des Radius eines Sauggummis der Saugscheibe zu der Zeit,
zu der die körperliche Linse angesaugt und befestigt wird, als die äußere Konfiguration
der Saugscheibe.
9. Linsenschleifmaschine zur Eingabe von Konfigurationsdaten des Linsenrahmens des Brillenrahmens,
von dem die körperliche Linse umrahmt werden soll, oder der durch Nachbilden derselben
erhaltenen Schablone, und zum Schleifen der körperlichen Linse auf der Grundlage der
Konfigurationsdaten, wobei die Linsenschleifmaschine mit dem Apparat zum Beurteilen,
ob eine bereits angesaugte und befestigte unbearbeitete Linse bearbeitet werden sollte
oder nicht, nach einem der Ansprüche 4 bis 8 versehen ist.
10. Verfahren zum Beurteilen, ob eine bereits angesaugte und befestigte unbearbeitete
Linse bearbeitet werden sollte oder nicht, mit einem Apparat nach Anspruch 4, dadurch
gekennzeichnet, daß eine Entscheidung, ob die unbearbeitete Linse bearbeitet werden
sollte oder nicht, in der Weise gebildet wird, daß eine visuelle Entscheidung gebildet
wird, ob das auf der Anzeigevorrichtung angezeigte Linsenrahmenbild innerhalb der
äußeren Peripherie der auf der Anzeigevorrichtung plazierten unbearbeiteten Linse
enthalten ist oder nicht, wenn die unbearbeitete Linse mit der bereits daran angesaugten
und befestigten Saugscheibe auf der Anzeigevorrichtung plaziert ist, um die Saugscheibe
an eine äußere Konfiguration einer auf der Anzeigevorrichtung angezeigten Saugscheibe
anzupassen.
1. Appareil pour déterminer si un verre non taillé (L) doit être usiné ou non, comprenant
:
un dispositif d'affichage (2) pour afficher une image (211) d'un cercle de verre représentant la conformation d'un cercle de verre (501) d'une monture de lunettes (500), un verre brut étant enchâssé à l'intérieur d'elle ou d'un gabarit obtenu en copiant ce cercle, et pour afficher une image de la conformation du verre non taillé (L) ;
un circuit d'imagerie (104) pour former une image affichée sur ledit dispositif d'affichage ;
un moyen d'entrée de rayon (diamètre) de verre pour entrer le rayon (diamètre) dudit verre brut ; caractérisé par :
un moyen d'entrée de position pour entrer une position de centre optique dudit verre brut par rapport à un centre géométrique dudit cercle de verre ; et
un circuit arithmétique/détermination (102) qui oblige ledit circuit d'imagerie à afficher ladite image dudit cercle de verre sur ledit dispositif d'affichage (2), la conformation dudit cercle de verre étant calculée à partir de l'information de rayon vecteur (ρ1, ϑ1), qui est entrée par un appareil de mesure de conformation de cercle (10) dudit cercle de verre de la monture de lunettes, ou à partir de l'information de rayon vecteur dudit gabarit obtenu en copiant ce cercle, et qui oblige ledit circuit d'imagerie (104) à afficher simultanément une image de verre dudit verre non taillé sur ledit dispositif d'affichage en même temps que ladite image de cercle de verre, une position de ladite image de verre dudit verre non taillé étant obtenue de façon à ce qu'un centre optique indiqué par ledit moyen d'entrée de position soit déterminé en tant que centre de ladite image de verre dudit verre non taillé ayant un rayon (diamètre) indiqué par ledit moyen d'entrée de rayon (diamètre).
un dispositif d'affichage (2) pour afficher une image (211) d'un cercle de verre représentant la conformation d'un cercle de verre (501) d'une monture de lunettes (500), un verre brut étant enchâssé à l'intérieur d'elle ou d'un gabarit obtenu en copiant ce cercle, et pour afficher une image de la conformation du verre non taillé (L) ;
un circuit d'imagerie (104) pour former une image affichée sur ledit dispositif d'affichage ;
un moyen d'entrée de rayon (diamètre) de verre pour entrer le rayon (diamètre) dudit verre brut ; caractérisé par :
un moyen d'entrée de position pour entrer une position de centre optique dudit verre brut par rapport à un centre géométrique dudit cercle de verre ; et
un circuit arithmétique/détermination (102) qui oblige ledit circuit d'imagerie à afficher ladite image dudit cercle de verre sur ledit dispositif d'affichage (2), la conformation dudit cercle de verre étant calculée à partir de l'information de rayon vecteur (ρ1, ϑ1), qui est entrée par un appareil de mesure de conformation de cercle (10) dudit cercle de verre de la monture de lunettes, ou à partir de l'information de rayon vecteur dudit gabarit obtenu en copiant ce cercle, et qui oblige ledit circuit d'imagerie (104) à afficher simultanément une image de verre dudit verre non taillé sur ledit dispositif d'affichage en même temps que ladite image de cercle de verre, une position de ladite image de verre dudit verre non taillé étant obtenue de façon à ce qu'un centre optique indiqué par ledit moyen d'entrée de position soit déterminé en tant que centre de ladite image de verre dudit verre non taillé ayant un rayon (diamètre) indiqué par ledit moyen d'entrée de rayon (diamètre).
2. Appareil pour déterminer si un verre non taillé doit être usiné ou non selon la revendication
1, qui comprend, de plus, un moyen de détermination pour déterminer si au moins une
partie de ladite image de cercle de verre déborde ou non de ladite image de verre,
et qui comprend un moyen de message d'avertissement pour délivrer un massage d'avertissement
lorsque ledit moyen de détermination a déterminé qu'au moins une partie de ladite
image de cercle de verre déborde de ladite image de verre.
3. Machine à tailler les verres pour entrer des données de conformation d'un cercle de
verre d'une monture de lunettes munie d'un verre brut enchâssé à l'intérieur ou d'un
gabarit obtenu en copiant ce cercle, et pour tailler le verre brut sur la base desdites
données de conformation, ladite machine à tailler les verres possédant ledit appareil
de détermination d'usinabilité de verre selon la revendication 1 ou 2.
4. Appareil pour déterminer si un verre non taillé déjà aspiré et maintenu doit être
usiné ou non, comprenant :
un dispositif d'affichage (2) pour afficher une image (211) d'un cercle de verre représentant la conformation d'un cercle de verre (501) d'une monture de lunettes (500), un verre brut étant enchâssé à l'intérieur de lui ou d'un gabarit obtenu en copiant ce cercle ;
un circuit d'imagerie (104) pour former une image affichée sur ledit dispositif d'affichage ;
un moyen d'entrée pour entrer une position de centre optique dudit verre brut par rapport à un centre géométrique dudit cercle de verre ; caractérisé par :
un moyen formant mémoire (103) pour stocker initialement une conformation extérieure (213) d'un disque d'aspiration (C) qui est mis en marche et qui maintient ledit verre non taillé ; et
un circuit arithmétique/détermination (102) qui oblige ledit circuit d'imagerie à afficher ladite image dudit cercle de verre (211) sur ledit dispositif d'affichage (2), la conformation dudit cercle de verre étant calculée à partir de l'information de rayon vecteur, qui est entrée par un appareil de mesure de conformation de cercle dudit cercle de verre de la monture de lunettes, ou à partir de l'information de rayon vecteur dudit gabarit obtenu en copiant ce cercle, et qui oblige ledit circuit d'imagerie à afficher simultanément une image de ladite conformation extérieure (213) dudit disque d'aspiration (C) sur ledit dispositif d'affichage en même temps que ladite image de cercle de verre, une position de ladite image de ladite conformation extérieure dudit disque d'aspiration étant obtenue de façon à ce que le centre (O') de ladite conformation extérieure dudit disque d'aspiration (C) soit obligé de coïncider avec ladite position de centre optique (O) dudit verre non taillé sur la base des informations concernant une conformation extérieure dudit disque d'aspiration.
un dispositif d'affichage (2) pour afficher une image (211) d'un cercle de verre représentant la conformation d'un cercle de verre (501) d'une monture de lunettes (500), un verre brut étant enchâssé à l'intérieur de lui ou d'un gabarit obtenu en copiant ce cercle ;
un circuit d'imagerie (104) pour former une image affichée sur ledit dispositif d'affichage ;
un moyen d'entrée pour entrer une position de centre optique dudit verre brut par rapport à un centre géométrique dudit cercle de verre ; caractérisé par :
un moyen formant mémoire (103) pour stocker initialement une conformation extérieure (213) d'un disque d'aspiration (C) qui est mis en marche et qui maintient ledit verre non taillé ; et
un circuit arithmétique/détermination (102) qui oblige ledit circuit d'imagerie à afficher ladite image dudit cercle de verre (211) sur ledit dispositif d'affichage (2), la conformation dudit cercle de verre étant calculée à partir de l'information de rayon vecteur, qui est entrée par un appareil de mesure de conformation de cercle dudit cercle de verre de la monture de lunettes, ou à partir de l'information de rayon vecteur dudit gabarit obtenu en copiant ce cercle, et qui oblige ledit circuit d'imagerie à afficher simultanément une image de ladite conformation extérieure (213) dudit disque d'aspiration (C) sur ledit dispositif d'affichage en même temps que ladite image de cercle de verre, une position de ladite image de ladite conformation extérieure dudit disque d'aspiration étant obtenue de façon à ce que le centre (O') de ladite conformation extérieure dudit disque d'aspiration (C) soit obligé de coïncider avec ladite position de centre optique (O) dudit verre non taillé sur la base des informations concernant une conformation extérieure dudit disque d'aspiration.
5. Appareil pour déterminer si un verre non taillé déjà aspiré et maintenu doit être
usiné ou non selon la revendication 4, dans lequel ledit moyen d'affichage d'image
est conçu de façon à ce que ledit verre brut, le disque d'aspiration étant en marche
et maintenant le verre, puisse être placé sur une surface d'affichage de l'appareil
de telle manière que ledit disque d'aspiration coïncide avec la conformation extérieure
dudit disque d'aspiration.
6. Appareil pour déterminer si un verre non taillé doit être usiné ou non, selon l'une
quelconque des revendications 1, 2, 4 et 5, dans lequel ledit moyen d'entrée comprend
un moyen d'entrée FPD pour entrer une valeur PD de cercle de ladite monture de lunettes,
un moyen d'entrée de PD pour entrer une valeur de distance entre pupilles de l'utilisateur
de lunettes, un moyen arithmétique pour calculer une différence entre ladite valeur
PD de cercle et ladite valeur de distance entre pupilles et pour trouver une quantité
décalée vers l'intérieur dudit verre brut, et un moyen d'entrée de UP pour entrer
une quantité décalée vers le haut dudit verre brut.
7. Appareil pour déterminer si un verre non taillé déjà aspiré et maintenu doit être
usiné ou non, selon l'une quelconque des revendications 4 à 6, qui comprend, de plus,
un moyen de détermination pour déterminer si au moins une partie de la conformation
extérieure dudit disque d'aspiration est "située" ou non à l'extérieur de la conformation
dudit cercle ou dudit gabarit, et comprend un moyen de message d'avertissement pour
délivrer un message d'avertissement à cet effet lorsque ledit moyen de détermination
a déterminé que la conformation est "située".
8. Appareil pour déterminer si un verre non taillé déjà aspiré et maintenu doit être
usiné ou non, selon l'une quelconque des revendications 4 à 7, dans lequel ledit moyen
formant mémoire est conçu pour stocker le rayon d'une coupelle en caoutchouc d'aspiration
dudit disque d'aspiration au moment où ledit verre brut est aspiré et maintenu en
tant que conformation extérieure dudit disque d'aspiration.
9. Machine à tailler les verres pour entrer des données de conformation dudit cercle
de verre d'une monture de lunettes dans laquelle ledit verre brut est à enchâsser,
ou dudit gabarit obtenu en copiant ce cercle, et pour tailler ledit verre brut sur
la base desdites données de conformation, ladite machine à tailler les verres étant
munie dudit appareil pour déterminer si un verre non taillé déjà aspiré et maintenu
doit être usiné ou non selon l'une quelconque des revendications 4 à 8.
10. Procédé pour déterminer si un verre non taillé déjà aspiré et maintenu doit être usiné
ou non avec un appareil selon la revendication 4, caractérisé en ce qu'une détermination
pour savoir si ledit verre non taillé doit être usiné ou non est formée de façon à
ce qu'une détermination visuelle soit formée pour savoir si ladite image de cercle
de verre affichée sur ledit dispositif d'affichage est incluse ou non à l'intérieur
de la périphérie extérieure dudit verre non taillé placé sur ledit dispositif d'affichage
lorsque ledit verre non taillé, avec un disque d'aspiration déjà en marche et maintenant
ce verre, est placé sur ledit dispositif d'affichage de façon à ajuster ledit disque
d'aspiration à une conformation extérieure d'un disque d'aspiration affiché sur ledit
dispositif d'affichage.